Finding the Third Proportional to 300.09 and 656.30

Step by Step Solution

1. Step 1: Write the proportion equation
   300.09 : 656.30 = 656.30 : x
2. Step 2: Convert to fraction form
   300.09/656.30 = 656.30/x
3. Step 3: Cross multiply
   300.09x = 656.30 × 656.30
4. Step 4: Simplify right side
   300.09x = 430,725.59
5. Step 5: Solve for x
   x = 430,725.59/300.09
6. Step 6: Final answer
   x = 1,435.30